Flanging device



Aug. 24 1926.

'. R. M. BOWMAN FLANGING DEVICE Filed Sept. 9, 1925 2 Sheets-Sheet 1 Aug. 24,1926. 1,597,575

R. M. BOWMAN FLANGING DEVICE Filed Se t. 9', 1 2' P a 2 Sheets Sheet 2 '5" 1 J1 JV 8 I,l r 2 21 jg n A 34 J 1 A I ///fl 5 |o g g v y 17 z/mmw ATTORNEY WITNESS:

l atented Aug. 24, 1926.

UNITED STATES ROBERT M. BOWMAN, OF CHATTANOOGA, TENNESSEE.

FLANGING DEVICE.

Application filed September a, 1925. Serial No. 5,416

A The general object of this invention is to provide means for enlarging the ends of tubes or cylinders, such as the fire boxes ner so that they can pass over the lap joint,

or other irregularities in the member being operated upon. a a

' This invention also consists in certain other'features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a side view of the apparatus.

Figure 2 is a planview with parts broken away.

Figure 3 is a longitudinal sectional View.

Figure 4 is a detail sectional view showing how the device operates to expand a member. 7

In these views, 1 indicates a table for supporting the various parts and 2 indicates an upright shaft which is rotatably mounted in the center of the table and is provided with the anti-friction bearings 3. This shaft is rotated from any suitable source of power through means of the shaft, Al journaled in the table and the gears 5 which connect the two shafts together. A head 6 is slidably mounted on the shaft and caused to rotate therewith through means of the key 7 and the keyway- 8; This head is yieldingly supported by means of a spring 9 encircling the shaft 2 and resting against a collar 10 on the lower part of the shaft. A sleeve 11 encircles the upper part of the shaft and rests upon the head 6 and a spring 12 on the reduced upper end of the shaft 2 bears against the upper end of the sleeve and against the hand wheel 13 which is screw threadedly attached to the shaft, as

' at 14. Arms 15 are pivoted to the head 6 and the outer end of each arm carries a disc 16 which has its periphery beveled or rounded, as at.17. A roller 18 is alsoi cal ried by the under part of eachfarmand is adapted to engage the table top when" the arms are in their lowest position? brace 19 connects the pivotbolt 20 of ,,each disc with an adjacent part of the head,;as. shown in Figures 1 and 2; T H

The form 21 for holding the article A be ing expanded, is of ring shape and isformed with two sections which are hingedly. connected together, as at 22, and have their opposite ends adapted to be fastenedtof, gether by the bolt-23. 'This form is pro} vided with an inwardly extending flange 24;

The fire, box A or other; article after be! ing heated is placed over the device endin to the form with'its bottom end resting 11 131 on the table. The feed. wheellg is then turned to cause the spring 12 to depress the head 6 so as to spread the arms 15 to cause the disc 16 to contact with the member Av so that the lower end of themernber will be expanded as the device is rotated. The

feed wheel is gradually turned, so as to gradsired extent the form is separated so thatthe member can be lifted off the table without interference on the part of the form. By having the springs engaging the head the roller can pass over lap joints of the member without damage to the parts. The formatlon of the disc will roll in the knuckle of the flange being ogeed andthe rollers 18 will prevent the arms from coming in contact with the table.

This machine will ogee a fire box in one tion that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is 1. A device of the class. described comprising a supporting table,a shaft rotatably mounted therein, means forrotating means to cause the head to gradually move downwardly on the shaft to spread the arms and means on the table for holding the artiole to be operated upon by the disks.

2. A device of the class described com-.

prising a supporting table, a shaft rotatably mounted therein, means for rotating the shaft, a head keyed to the shaft and having sliding movement thereon, arms carried by the head, a disc rotatably mounted at the outer end of eacharnn mean's for gradually feeding the head downwardly to spread the arms,a form on the table for holding the article to be operated upon, said form having an inwardly extending flange and said form being formed in sections and means for detachably connecting the sections together. a L Y 3. An apparatus of the class described means comprising a table, an upright shaft rotatably mounted therein, means for, rotating the shaft, a head keyed to the shaft and slid- "a-bly mounted thereon, a spring'on the shaft for normally holding the head in raised position, spring means on the shaft for pressingthe head downwardly, manually operated means for controlling the tension of the said -spring means, arms pivoted to the head, a disc rotatably mounted at the outer end of each arm and a sectional form mounted on the table for holding the article being operated upon. V

4. An apparatus of the class described comprising a table, an upright shaft rotatably mounted therein, means for rotating the shaft, a head keyed to the shaft and slidably mounted thereon, a spring on the shaft for normally holding the head in raised position, spring means on the shaft for pressing the head downwardly, manually operated means for controlling the tension of the said spring means, arms pivoted to the head, a disc rotatably mounted at the outer end of each arm, the edges of the disc being rounded; rollers on the under sides of the arms, and a'sectional form mounted on the table for holding the article being operated upon. 7 I

In testimonywhereof I affix my signature.

ROBERT M. BOWMAN. 

